Urethane Casting

Within 15 business days


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Low-Volumes with Production-Level Quality

Urethane casting provides end-use, rigid or flexible plastic parts with production-level quality.   Built without expensive and time-consuming hard tooling, our urethane casting process uses a 3D printed master pattern and silicone molds to deliver high-quality, short-run parts up to 30” long.

The finished dimensions of urethane cast parts depends on the accuracy of the master model, part geometry and casting material.  In general, a shrinkage rate of + 0.15% is expected.

Advantages of Urethane Casting


Urethane casting can serve as an important bridge between rapid prototyping and production in the product development lifecycle.  The casting process produces parts with both end-use functionality and high-quality appearance, including professional color matching and finishes.  Since both the tooling and master pattern used in the casting process can be produced quickly and with low upfront capital costs, urethane casting is considered a faster and more cost-effective solution to injection molding for low quantities.



Polyurethane cast materials are available in either rigid or flexible end-use plastics.  Urethane cast parts are generally as tough or tougher than injection molded pieces, and are significantly stronger than 3D printed counterparts.


Our casting process is optimal for low-volume production for quantities of one to several hundred.  On average, a silicone mold can accurately cast about 20-50 parts.  The maximum quantity varies based on part design and material cast.

Material Selection

We offer a wide range of rigid and flexible urethane cast materials, from very soft and flexible (Shore A) to extremely rigid and impact resistant (Shore D).  Parts are cast in a color that is blended to your specifications.



Professional Finish

The urethane casting process is capable of reproducing small details.  Little to no finishing is required, because the desired textures and finish levels are applied to the master pattern.

Rapid Turnaround

Urethane cast parts are shipped within 15 business days, depending on order specifications and volume.  By contrast, injection molded parts can take months to build.




Low-Volume Production

Urethane cast parts are perfect for low-quantity production — when volumes do not justify investment in injection mold tooling — as well as for first run production parts, which can be completed weeks before production tooling is ready.

Advanced Prototyping

The urethane casting process and relatively inexpensive tooling involved makes it easy and economical to make any necessary design changes.  Additionally, different materials can be used with the same mold, making it possible to test designs with a variety of materials.

Market Testing

End-user functionality and a high-quality finish makes urethane cast parts ideal for consumer testing, user evaluation and concept models.  Using the cast urethane process means that changes can be incorporated quickly for either further testing or market launch.




Parts are built with a smooth, high-quality surface finish and your choice of color.


Xometry can provide additional processing, including custom painting and hardware installation, to meet your needs.

Save 20% on your first order with code FIRST20

Offer valid on orders up to $10,000. One-time use for first-time Xometry users only. Cannot be combined with another offer. Limited time offer.